Every system is abstract and conditional. Life in its diversity does not fit into any concept. The system requires a generalization of facts, therefore it contains elements of rationalism, even if its content was directed with its weapon against rationalism. The task and goal of a certain concept is to capture and reflect the most general patterns and trends. Even the philosophy of intuitionism tries to prove the importance of intuition in logical systems. Even skepticism tries to prove the powerlessness of reason with rational evidence and conclusions. The concept is an attempt to illuminate the chaos of facts with the dim light of human reason. We recognize the conventionality and limitations of such attempts, but we see no alternative. Source: